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    <title>Document</title>
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    <script>
        // 交换两个蜜汁操作
        let lefthand = 'R闪'
        let righthand = '落地双风'
        let foot;
        foot = lefthand;
        lefthand = righthand;
        righthand = foot;
        console.log(lefthand, righthand);
    </script>
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